officers to look for microexpressions of travelers that may be planning a terrorist attack. observing behavior is one of the basic tools that can be used at the airport. but obviously it is only one single tool in a much wider and more complex strategy. reporter: in a statement to abc news, the tsa said that the 25,000 s surity breaches represent just a tiny fraction of 1% of the billions of airline passengers screened since 9/11. peggy and daniel? and everybody s got to go through airport security. everyone, no exceptions. including the former secretary of defense, donald rumsfeld. take a look at this. tmz captured t tse photos of him getting the pat down here. you ll see he was at chicago s o hare airport yesterday. tmz caught these photos as rumsfeld was cooperative. they say that he even smiled at some of the agents there. they work hard, those tsa guys and women. sometimes a smile goes a long way. a lot of folks traveling might be wondering about the weather. here